National Semiconductor LM1875 free download

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LM1875 20W Audio Power Amplifier March 1995 LM1875 20W Audio Power Amplifier General Description The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications The LM1875 delivers 20 watts into a 4X or 8X load on g 25V supplies Using an 8X load and g 30V supplies over 30 watts of power may be delivered The amplifier is designed to operate with a minimum of external components Device overload protection consists of both internal current limit and thermal shutdown The LM1875 design takes advantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels Other outstanding features include high gain fast slew rate and a wide power bandwidth large output voltage swing high current capability and a very wide supply range The amplifier is internally compensated and stable for gains of 10 or greater Features Y Y Y Y Y Y Y Y Y Y Y Up to 30 watts output power AVO typically 90 dB Low distortion 0 015% 1 kHz 20 W Wide power bandwidth 70 kHz Protection for AC and DC short circuits to ground Thermal protection with parole circuit High current capability 4A Wide supply range 16V-60V Internal output protection diodes 94 dB ripple rejection Plastic power package TO-220 Applications Y Y Y Y Y High performance audio systems Bridge amplifiers Stereo phonographs Servo amplifiers Instrument systems Connection Diagram Typical Applications TL H 5030 ­ 1 Front View Order Number LM1875T See NS Package Number T05B TL H 5030 ­ 2 C1995 National Semiconductor Corporation TL H 5030 RRD-B30M75 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Input Voltage 60V b VEE to VCC Storage Temperature Junction Temperature b 65 C to a 150 C 150 C 260 C 3C 73 C Lead Temperature (Soldering 10 seconds) iJC iJA Electrical Characteristics VCC e a 25V bVEE eb25V TAMBIENT e 25 C RL e 8X AV e 20 (26 dB) fo e 1 kHz unless otherwise specified Parameter Supply Current Output Power (Note 1) THD (Note 1) Conditions POUT e 0W THD e 1% POUT e 20W POUT e 20W POUT e 20W POUT e 20W fo e 1 kHz fo e 20 kHz RL e 4X fo e 1 kHz RL e 4X fo e 20 kHz Typical 70 25 0 015 0 05 0 022 0 07 g1 g0 2 Tested Limits 100 Units mA W 04 06 g 15 g2 g0 5 % % % % mV mA mA MHz dB Offset Voltage Input Bias Current Input Offset Current Gain-Bandwidth Product Open Loop Gain PSRR Max Slew Rate Current Limit Equivalent Input Noise Voltage fo e 20 kHz DC VCC 1 kHz 1 Vrms VEE 1 kHz 1 Vrms 20W 8X 70 kHz BW VOUT e VSUPPLY b10V RS e 600X CCIR 0 55 90 95 83 8 4 3 52 52 dB dB V ms 3 A mVrms Note 1 Assumes the use of a heat sink having a thermal resistance of 1 C W and no insulator with an ambient temperature of 25 C Because the output limiting circuitry has a negative temperature coefficient the maximum output power